文章目录
GstMapInfo
typedef struct {
GstMemory *memory;
GstMapFlags flags;
guint8 *data;
gsize size;
gsize maxsize;
} GstMapInfo;
A structure containing the result of a map operation such asgst_memory_map().
It contains the data and size.
Members
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GstMemory * |
a pointer to the mapped memory |
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GstMapFlags |
flags used when mapping the memory |
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a pointer to the mapped data. |
[array length=size] | |
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the valid size in |
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the maximum bytes in |
GstBuffer
typedef struct {
GstMiniObject mini_object;
/* pointer to data and its size */
guint8 *data;
guint size;
/* timestamp */
GstClockTime timestamp;
GstClockTime duration;
/* the media type of this buffer */
GstCaps *caps;
/* media specific offset */
guint64 offset;
guint64 offset_end;
guint8 *malloc_data;
} GstBuffer;
The structure of a
GstBuffer. Use the associated macros to access the publicvariables.
GstMiniObject mini_object; |
the parent structure |
guint8 *data; |
pointer to the buffer data |
guint size; |
size of buffer data |
GstClockTime timestamp; |
timestamp of the buffer, can be GST_CLOCK_TIME_NONE when the timestamp is not known or relevant. |
GstClockTime duration; |
duration in time of the buffer data, can be GST_CLOCK_TIME_NONE when the duration is not known or relevant. |
GstCaps *caps; |
the GstCaps describing the data format in this buffer |
guint64 offset; |
a media specific offset for the buffer data. For video frames, this is the frame number of this buffer. For audio samples, this is the offset of the first sample in this buffer. For file data or compressed data this is the byte offset of the first byte in this buffer. |
guint64 offset_end; |
the last offset contained in this buffer. It has the same format as offset. |
guint8 *malloc_data; |
a pointer to the allocated memory associated with this buffer. When the buffer is freed, this data will freed withfree(). |